diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 5d8f867b9b83..8d1c2dfe3bec 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -18454,7 +18454,35 @@ static const struct aead_testvec aes_gcm_rfc4543_enc_tv_template[] = {
 			  "\xe1\x55\x10\x6a\xa8\xdc\xd6\x18"
 			  "\xe4\x09\x9a\xaa",
 		.rlen	= 68,
-	}
+	}, { /* nearly same as previous, but should fail */
+		.key	= "\x4c\x80\xcd\xef\xbb\x5d\x10\xda"
+			  "\x90\x6a\xc7\x3c\x36\x13\xa6\x34"
+			  "\x22\x43\x3c\x64",
+		.klen	= 20,
+		.iv	= zeroed_string,
+		.assoc	= "\x00\x00\x43\x21\x00\x00\x00\x07"
+			  "\x00\x00\x00\x00\x00\x00\x00\x00",
+		.alen	= 16,
+		.input	= "\x45\x00\x00\x30\xda\x3a\x00\x00"
+			  "\x80\x01\xdf\x3b\xc0\xa8\x00\x05"
+			  "\xc0\xa8\x00\x01\x08\x00\xc6\xcd"
+			  "\x02\x00\x07\x00\x61\x62\x63\x64"
+			  "\x65\x66\x67\x68\x69\x6a\x6b\x6c"
+			  "\x6d\x6e\x6f\x70\x71\x72\x73\x74"
+			  "\x01\x02\x02\x01",
+		.ilen	= 52,
+		.novrfy = 1,
+		.result	= "\x45\x00\x00\x30\xda\x3a\x00\x00"
+			  "\x80\x01\xdf\x3b\xc0\xa8\x00\x05"
+			  "\xc0\xa8\x00\x01\x08\x00\xc6\xcd"
+			  "\x02\x00\x07\x00\x61\x62\x63\x64"
+			  "\x65\x66\x67\x68\x69\x6a\x6b\x6c"
+			  "\x6d\x6e\x6f\x70\x71\x72\x73\x74"
+			  "\x01\x02\x02\x01\xf2\xa9\xa8\x36"
+			  "\xe1\x55\x10\x6a\xa8\xdc\xd6\x18"
+			  "\x00\x00\x00\x00",
+		.rlen	= 68,
+	},
 };
 
 static const struct aead_testvec aes_gcm_rfc4543_dec_tv_template[] = {